LOWER MORELAND, Pa. (CBS) — An honors math teacher at Lower Moreland High School is free on $50,000 unsecured bail, charged with having a sexual relationship with a teenage student at the school.

Montgomery County prosecutors say Erica Ginnetti, a married, 33-year-old mother from Philadelphia, approached the 17-year-old boy at the prom last year and asked him if he wanted to work out at her gym.

Police say she began sexting the teen — sending him explicit pictures and messages — escalating to a sexual encounter in a car.

“They were extremely explicit — very detailed, very graphic, and totally inappropriate for a teacher to be communicating in this way with a student,” Montgomery County DA Risa Ferman told KYW Newsradio today.

Police say they received a report earlier this month from “Child Line” that a teacher was having a sexual relationship with a student.

“There is a line that you can’t cross and it is your responsibility to make sure that you don’t cross that line,” Ferman said.

Brad Segall is midday anchor for KYW Newsradio 1060.
A longtime presence in Philadelphia radio news, Segall served for a decade as KYW Newsradio's suburban bureau chief.
He won the 2006 Associated Press Sandy Starobin Award for Individual...